Molecular composition of recycled organic wastes, as determined by solid-state ¹³C NMR and elemental analyses

Journal Publication ResearchOnline@JCU
Eldridge, S.M.;Chen, C.R.;Xu, Z.H.;Nelson, P.N.;Boyd, S.E.;Meszaros, I.;Chan, K.Y.
Abstract

Using solid state ¹³C NMR data and elemental composition in a molecular mixing model, we estimated the molecular components of the organic matter in 16 recycled organic (RO) wastes representative of the major materials generated in the Sydney basin area. Close correspondence was found between the measured NMR signal intensities and those predicted by the model for all RO wastes except for poultry manure char. Molecular nature of the organic matter differed widely between the RO wastes. As a proportion of organic C, carbohydrate C ranged from 0.07 to 0.63, protein C from <0.01 to 0.66, lignin C from <0.01 to 0.31, aliphatic C from 0.09 to 0.73, carbonyl C from 0.02 to 0.23, and char C from 0 to 0.45. This method is considered preferable to techniques involving imprecise extraction methods for RO wastes. Molecular composition data has great potential as a predictor of RO waste soil carbon and nutrient outcomes.

Journal

Waste Management

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Volume

33

ISBN/ISSN

1879-2456

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Issue

11

Pages Count

13

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Publisher

Elsevier

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Date

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EISSN

N/A

DOI

10.1016/j.wasman.2013.06.013